Fig. 5From: Rapid identification of cellulose nitrate and cellulose acetate film in historic photograph collectionsCharacteristic TR infrared spectra collected from the samples analysed in this study. The spectra are grouped according to the following predominate spectral features (a) cellulose nitrate film base, b cellulose nitrate film and gelatin emulsion, c cellulose acetate film base and gelatin emulsion, d cellulose acetate film baseBack to article page